diff --git a/src/api/gs25Handlers.ts b/src/api/gs25Handlers.ts
index 9a59fb28..4b8cef18 100644
--- a/src/api/gs25Handlers.ts
+++ b/src/api/gs25Handlers.ts
@@ -1,3 +1,4 @@
+import { selectGs25InventoryProduct } from '../services/gs25/productSelection.js';
 import { convenienceTransportFromBindings } from '../utils/convenienceTransport.js';
 import { geocodeBindings } from '../utils/geocode.js';
 /**
@@ -296,7 +297,7 @@ export async function handleGs25CheckInventory(c: ApiContext) {
         ...convenienceTransportFromBindings(c.env),
         zyteApiKey: c.env?.ZYTE_API_KEY,
       });
-      firstProduct = searchProducts.find((p) => p.itemCode.length > 0);
+      firstProduct = selectGs25InventoryProduct(searchProducts, keyword);
 
       if (firstProduct) {
         resolvedItemCode = firstProduct.itemCode;
diff --git a/src/services/gs25/productSelection.ts b/src/services/gs25/productSelection.ts
new file mode 100644
index 00000000..5d8c415a
--- /dev/null
+++ b/src/services/gs25/productSelection.ts
@@ -0,0 +1,14 @@
+import type { Gs25SearchProduct } from './productSearch.js';
+
+// GS 검색의 첫 항목이 다른 용량/제로 제품일 수 있어 정확한 상품명을 먼저 선택한다.
+export function selectGs25InventoryProduct(
+  products: Gs25SearchProduct[],
+  keyword: string,
+): Gs25SearchProduct | undefined {
+  const normalize = (name: string) => name.replace(/\s+/g, '').toLowerCase();
+  const query = normalize(keyword);
+  const valid = products.filter((product) => product.itemCode.length > 0);
+  return valid.find((product) => normalize(product.itemName) === query)
+    ?? valid.find((product) => normalize(product.shortItemName) === query)
+    ?? valid[0];
+}
diff --git a/src/services/gs25/tools/checkInventory.ts b/src/services/gs25/tools/checkInventory.ts
index 8b8772d3..a415eca2 100644
--- a/src/services/gs25/tools/checkInventory.ts
+++ b/src/services/gs25/tools/checkInventory.ts
@@ -1,3 +1,4 @@
+import { selectGs25InventoryProduct } from '../productSelection.js';
 import type { ConvenienceTransportOptions } from '../../../utils/convenienceTransport.js';
 import type { GeocodeOptions } from '../../../utils/geocode.js';
 /**
@@ -139,7 +140,7 @@ async function checkInventory(args: CheckInventoryArgs): Promise<McpToolResponse
       timeout: timeoutMs,
       zyteApiKey,
     });
-    firstProduct = searchProducts.find((p) => p.itemCode.length > 0);
+    firstProduct = selectGs25InventoryProduct(searchProducts, keyword);
 
     if (firstProduct) {
       resolvedItemCode = firstProduct.itemCode;
diff --git a/tests/services/gs25/productSelection.test.ts b/tests/services/gs25/productSelection.test.ts
new file mode 100644
index 00000000..d4d4ca9f
--- /dev/null
+++ b/tests/services/gs25/productSelection.test.ts
@@ -0,0 +1,54 @@
+import { afterEach, expect, it, vi } from 'vitest';
+import { selectGs25InventoryProduct } from '../../../src/services/gs25/productSelection.js';
+import { createCheckInventoryTool } from '../../../src/services/gs25/tools/checkInventory.js';
+import { handleGs25CheckInventory } from '../../../src/api/gs25Handlers.js';
+import { clearGs25StoresCache } from '../../../src/services/gs25/client.js';
+
+const product = (itemCode: string, itemName: string, shortItemName = '') => ({
+  itemCode, itemName, shortItemName, imageUrl: '', rating: 0, stockCheckEnabled: true,
+});
+const products = [product('zero', '코카콜라제로캔350ML'), product('8801094017200', '코카콜라캔350ML')];
+afterEach(() => { vi.unstubAllGlobals(); clearGs25StoresCache(); });
+
+it('일반 콜라 정확 일치를 먼저 선택한다', () => {
+  expect(selectGs25InventoryProduct(products, '코카콜라 캔350ml')).toBe(products[1]);
+});
+it('전체 이름 일치를 축약 이름 일치보다 우선한다', () => {
+  const rows = [product('zero', '제로', '콜라'), product('regular', '콜라')];
+  expect(selectGs25InventoryProduct(rows, '콜라')).toBe(rows[1]);
+});
+it('축약 이름도 정확히 일치하면 선택한다', () => {
+  const rows = [products[0], product('regular', '다른 전체 이름', '콜라')];
+  expect(selectGs25InventoryProduct(rows, '콜라')).toBe(rows[1]);
+});
+it('정확 일치가 없는 일반 키워드는 기존 검색 순서를 유지한다', () => {
+  expect(selectGs25InventoryProduct(products, '콜라')).toBe(products[0]);
+});
+it('코드가 없는 정확 일치 항목은 건너뛴다', () => {
+  expect(selectGs25InventoryProduct([product('', '콜라'), ...products], '콜라')).toBe(products[0]);
+});
+it('유효한 코드가 없으면 undefined를 반환한다', () => {
+  expect(selectGs25InventoryProduct([product('', '콜라')], '콜라')).toBeUndefined();
+  expect(selectGs25InventoryProduct([], '콜라')).toBeUndefined();
+});
+
+it.each(['REST', 'MCP'])('%s는 선택된 일반 콜라 코드로 실제 재고를 요청한다', async (route) => {
+  const fetchMock = vi.fn().mockResolvedValueOnce(new Response(JSON.stringify({
+    SearchQueryResult: { Collection: [{ Documentset: { Document: products.map(p => ({ field: p })) } }] },
+  }))).mockResolvedValueOnce(new Response(JSON.stringify({ stores: [{ storeCode: 'VO882', storeName: '강남본점', realStockQuantity: '7' }] })));
+  vi.stubGlobal('fetch', fetchMock);
+  let payload: { itemCode: string; product: { name: string }; inventory: { stores: { realStockQuantity: number }[] } };
+  if (route === 'MCP') {
+    const result = await createCheckInventoryTool().handler({ keyword: '코카콜라캔350ML', latitude: 37.4981, longitude: 127.0276 });
+    payload = JSON.parse(result.content[0].text);
+  } else {
+    const json = vi.fn();
+    const queries: Record<string, string> = { keyword: '코카콜라캔350ML', lat: '37.4981', lng: '127.0276' };
+    await handleGs25CheckInventory({ env: {}, req: { query: (key: string) => queries[key] }, json } as unknown as Parameters<typeof handleGs25CheckInventory>[0]);
+    payload = json.mock.calls[0][0].data;
+  }
+  expect(payload.itemCode).toBe('8801094017200');
+  expect(payload.product.name).toBe('코카콜라캔350ML');
+  expect(String(fetchMock.mock.calls[1][0])).toContain('itemCode=8801094017200');
+  expect(payload.inventory.stores[0].realStockQuantity).toBe(7);
+});